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/*
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* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.net;
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import java.io.IOException;
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import java.io.InputStream;
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import org.apidesign.bck2brwsr.core.JavaScriptBody;
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/**
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* Class <code>URL</code> represents a Uniform Resource
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* Locator, a pointer to a "resource" on the World
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* Wide Web. A resource can be something as simple as a file or a
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* directory, or it can be a reference to a more complicated object,
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* such as a query to a database or to a search engine. More
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* information on the types of URLs and their formats can be found at:
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* <blockquote>
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* <a href="http://www.socs.uts.edu.au/MosaicDocs-old/url-primer.html">
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* <i>http://www.socs.uts.edu.au/MosaicDocs-old/url-primer.html</i></a>
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* </blockquote>
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* <p>
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* In general, a URL can be broken into several parts. The previous
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* example of a URL indicates that the protocol to use is
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* <code>http</code> (HyperText Transfer Protocol) and that the
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* information resides on a host machine named
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* <code>www.socs.uts.edu.au</code>. The information on that host
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* machine is named <code>/MosaicDocs-old/url-primer.html</code>. The exact
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* meaning of this name on the host machine is both protocol
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* dependent and host dependent. The information normally resides in
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* a file, but it could be generated on the fly. This component of
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* the URL is called the <i>path</i> component.
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* <p>
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* A URL can optionally specify a "port", which is the
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* port number to which the TCP connection is made on the remote host
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* machine. If the port is not specified, the default port for
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* the protocol is used instead. For example, the default port for
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* <code>http</code> is <code>80</code>. An alternative port could be
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* specified as:
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* <blockquote><pre>
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* http://www.socs.uts.edu.au:80/MosaicDocs-old/url-primer.html
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* </pre></blockquote>
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* <p>
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* The syntax of <code>URL</code> is defined by <a
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* href="http://www.ietf.org/rfc/rfc2396.txt"><i>RFC 2396: Uniform
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* Resource Identifiers (URI): Generic Syntax</i></a>, amended by <a
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* href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format for
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* Literal IPv6 Addresses in URLs</i></a>. The Literal IPv6 address format
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* also supports scope_ids. The syntax and usage of scope_ids is described
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* <a href="Inet6Address.html#scoped">here</a>.
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* <p>
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* A URL may have appended to it a "fragment", also known
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* as a "ref" or a "reference". The fragment is indicated by the sharp
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* sign character "#" followed by more characters. For example,
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* <blockquote><pre>
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* http://java.sun.com/index.html#chapter1
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* </pre></blockquote>
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* <p>
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* This fragment is not technically part of the URL. Rather, it
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* indicates that after the specified resource is retrieved, the
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* application is specifically interested in that part of the
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* document that has the tag <code>chapter1</code> attached to it. The
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* meaning of a tag is resource specific.
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* <p>
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* An application can also specify a "relative URL",
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* which contains only enough information to reach the resource
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* relative to another URL. Relative URLs are frequently used within
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* HTML pages. For example, if the contents of the URL:
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* <blockquote><pre>
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* http://java.sun.com/index.html
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* </pre></blockquote>
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* contained within it the relative URL:
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* <blockquote><pre>
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* FAQ.html
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* </pre></blockquote>
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* it would be a shorthand for:
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* <blockquote><pre>
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* http://java.sun.com/FAQ.html
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* </pre></blockquote>
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* <p>
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* The relative URL need not specify all the components of a URL. If
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* the protocol, host name, or port number is missing, the value is
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* inherited from the fully specified URL. The file component must be
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* specified. The optional fragment is not inherited.
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* <p>
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* The URL class does not itself encode or decode any URL components
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* according to the escaping mechanism defined in RFC2396. It is the
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* responsibility of the caller to encode any fields, which need to be
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* escaped prior to calling URL, and also to decode any escaped fields,
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* that are returned from URL. Furthermore, because URL has no knowledge
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* of URL escaping, it does not recognise equivalence between the encoded
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* or decoded form of the same URL. For example, the two URLs:<br>
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* <pre> http://foo.com/hello world/ and http://foo.com/hello%20world</pre>
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* would be considered not equal to each other.
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* <p>
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* Note, the {@link java.net.URI} class does perform escaping of its
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* component fields in certain circumstances. The recommended way
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* to manage the encoding and decoding of URLs is to use {@link java.net.URI},
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* and to convert between these two classes using {@link #toURI()} and
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* {@link URI#toURL()}.
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* <p>
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* The {@link URLEncoder} and {@link URLDecoder} classes can also be
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* used, but only for HTML form encoding, which is not the same
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* as the encoding scheme defined in RFC2396.
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*
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* @author James Gosling
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* @since JDK1.0
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*/
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public final class URL implements java.io.Serializable {
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static final long serialVersionUID = -7627629688361524110L;
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/**
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* The property which specifies the package prefix list to be scanned
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* for protocol handlers. The value of this property (if any) should
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* be a vertical bar delimited list of package names to search through
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* for a protocol handler to load. The policy of this class is that
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* all protocol handlers will be in a class called <protocolname>.Handler,
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* and each package in the list is examined in turn for a matching
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* handler. If none are found (or the property is not specified), the
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* default package prefix, sun.net.www.protocol, is used. The search
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* proceeds from the first package in the list to the last and stops
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* when a match is found.
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*/
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private static final String protocolPathProp = "java.protocol.handler.pkgs";
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/**
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* The protocol to use (ftp, http, nntp, ... etc.) .
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* @serial
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*/
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private String protocol;
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/**
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* The host name to connect to.
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* @serial
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*/
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private String host;
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/**
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* The protocol port to connect to.
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* @serial
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*/
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private int port = -1;
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/**
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* The specified file name on that host. <code>file</code> is
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* defined as <code>path[?query]</code>
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* @serial
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*/
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private String file;
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/**
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* The query part of this URL.
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*/
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private transient String query;
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/**
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* The authority part of this URL.
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* @serial
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*/
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private String authority;
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/**
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* The path part of this URL.
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*/
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private transient String path;
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/**
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* The userinfo part of this URL.
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*/
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private transient String userInfo;
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/**
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* # reference.
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* @serial
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*/
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private String ref;
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/**
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* The host's IP address, used in equals and hashCode.
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* Computed on demand. An uninitialized or unknown hostAddress is null.
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*/
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transient Object hostAddress;
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/**
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* The URLStreamHandler for this URL.
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*/
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transient URLStreamHandler handler;
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/* Our hash code.
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* @serial
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*/
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private int hashCode = -1;
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/**
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* Creates a <code>URL</code> object from the specified
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* <code>protocol</code>, <code>host</code>, <code>port</code>
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* number, and <code>file</code>.<p>
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*
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* <code>host</code> can be expressed as a host name or a literal
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* IP address. If IPv6 literal address is used, it should be
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* enclosed in square brackets (<tt>'['</tt> and <tt>']'</tt>), as
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* specified by <a
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* href="http://www.ietf.org/rfc/rfc2732.txt">RFC 2732</a>;
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* However, the literal IPv6 address format defined in <a
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* href="http://www.ietf.org/rfc/rfc2373.txt"><i>RFC 2373: IP
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* Version 6 Addressing Architecture</i></a> is also accepted.<p>
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*
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* Specifying a <code>port</code> number of <code>-1</code>
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* indicates that the URL should use the default port for the
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* protocol.<p>
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*
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* If this is the first URL object being created with the specified
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* protocol, a <i>stream protocol handler</i> object, an instance of
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* class <code>URLStreamHandler</code>, is created for that protocol:
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* <ol>
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* <li>If the application has previously set up an instance of
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* <code>URLStreamHandlerFactory</code> as the stream handler factory,
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* then the <code>createURLStreamHandler</code> method of that instance
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* is called with the protocol string as an argument to create the
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* stream protocol handler.
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* <li>If no <code>URLStreamHandlerFactory</code> has yet been set up,
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* or if the factory's <code>createURLStreamHandler</code> method
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* returns <code>null</code>, then the constructor finds the
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* value of the system property:
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* <blockquote><pre>
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* java.protocol.handler.pkgs
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* </pre></blockquote>
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* If the value of that system property is not <code>null</code>,
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* it is interpreted as a list of packages separated by a vertical
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* slash character '<code>|</code>'. The constructor tries to load
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* the class named:
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* <blockquote><pre>
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* <<i>package</i>>.<<i>protocol</i>>.Handler
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* </pre></blockquote>
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* where <<i>package</i>> is replaced by the name of the package
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* and <<i>protocol</i>> is replaced by the name of the protocol.
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* If this class does not exist, or if the class exists but it is not
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* a subclass of <code>URLStreamHandler</code>, then the next package
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* in the list is tried.
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* <li>If the previous step fails to find a protocol handler, then the
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* constructor tries to load from a system default package.
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* <blockquote><pre>
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* <<i>system default package</i>>.<<i>protocol</i>>.Handler
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* </pre></blockquote>
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* If this class does not exist, or if the class exists but it is not a
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* subclass of <code>URLStreamHandler</code>, then a
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* <code>MalformedURLException</code> is thrown.
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* </ol>
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*
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* <p>Protocol handlers for the following protocols are guaranteed
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* to exist on the search path :-
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* <blockquote><pre>
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* http, https, ftp, file, and jar
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* </pre></blockquote>
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* Protocol handlers for additional protocols may also be
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* available.
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*
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* <p>No validation of the inputs is performed by this constructor.
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*
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* @param protocol the name of the protocol to use.
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* @param host the name of the host.
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* @param port the port number on the host.
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* @param file the file on the host
|
jtulach@120
|
286 |
* @exception MalformedURLException if an unknown protocol is specified.
|
jtulach@120
|
287 |
* @see java.lang.System#getProperty(java.lang.String)
|
jtulach@120
|
288 |
* @see java.net.URL#setURLStreamHandlerFactory(
|
jtulach@120
|
289 |
* java.net.URLStreamHandlerFactory)
|
jtulach@120
|
290 |
* @see java.net.URLStreamHandler
|
jtulach@120
|
291 |
* @see java.net.URLStreamHandlerFactory#createURLStreamHandler(
|
jtulach@120
|
292 |
* java.lang.String)
|
jtulach@120
|
293 |
*/
|
jtulach@120
|
294 |
public URL(String protocol, String host, int port, String file)
|
jtulach@120
|
295 |
throws MalformedURLException
|
jtulach@120
|
296 |
{
|
jtulach@120
|
297 |
this(protocol, host, port, file, null);
|
jtulach@120
|
298 |
}
|
jtulach@120
|
299 |
|
jtulach@120
|
300 |
/**
|
jtulach@120
|
301 |
* Creates a URL from the specified <code>protocol</code>
|
jtulach@120
|
302 |
* name, <code>host</code> name, and <code>file</code> name. The
|
jtulach@120
|
303 |
* default port for the specified protocol is used.
|
jtulach@120
|
304 |
* <p>
|
jtulach@120
|
305 |
* This method is equivalent to calling the four-argument
|
jtulach@120
|
306 |
* constructor with the arguments being <code>protocol</code>,
|
jtulach@120
|
307 |
* <code>host</code>, <code>-1</code>, and <code>file</code>.
|
jtulach@120
|
308 |
*
|
jtulach@120
|
309 |
* No validation of the inputs is performed by this constructor.
|
jtulach@120
|
310 |
*
|
jtulach@120
|
311 |
* @param protocol the name of the protocol to use.
|
jtulach@120
|
312 |
* @param host the name of the host.
|
jtulach@120
|
313 |
* @param file the file on the host.
|
jtulach@120
|
314 |
* @exception MalformedURLException if an unknown protocol is specified.
|
jtulach@120
|
315 |
* @see java.net.URL#URL(java.lang.String, java.lang.String,
|
jtulach@120
|
316 |
* int, java.lang.String)
|
jtulach@120
|
317 |
*/
|
jtulach@120
|
318 |
public URL(String protocol, String host, String file)
|
jtulach@120
|
319 |
throws MalformedURLException {
|
jtulach@120
|
320 |
this(protocol, host, -1, file);
|
jtulach@120
|
321 |
}
|
jtulach@120
|
322 |
|
jaroslav@339
|
323 |
/**
|
jaroslav@339
|
324 |
* Creates a <code>URL</code> object from the specified
|
jaroslav@339
|
325 |
* <code>protocol</code>, <code>host</code>, <code>port</code>
|
jaroslav@339
|
326 |
* number, <code>file</code>, and <code>handler</code>. Specifying
|
jaroslav@339
|
327 |
* a <code>port</code> number of <code>-1</code> indicates that
|
jaroslav@339
|
328 |
* the URL should use the default port for the protocol. Specifying
|
jaroslav@339
|
329 |
* a <code>handler</code> of <code>null</code> indicates that the URL
|
jaroslav@339
|
330 |
* should use a default stream handler for the protocol, as outlined
|
jaroslav@339
|
331 |
* for:
|
jaroslav@339
|
332 |
* java.net.URL#URL(java.lang.String, java.lang.String, int,
|
jaroslav@339
|
333 |
* java.lang.String)
|
jaroslav@339
|
334 |
*
|
jaroslav@339
|
335 |
* <p>If the handler is not null and there is a security manager,
|
jaroslav@339
|
336 |
* the security manager's <code>checkPermission</code>
|
jaroslav@339
|
337 |
* method is called with a
|
jaroslav@339
|
338 |
* <code>NetPermission("specifyStreamHandler")</code> permission.
|
jaroslav@339
|
339 |
* This may result in a SecurityException.
|
jaroslav@339
|
340 |
*
|
jaroslav@339
|
341 |
* No validation of the inputs is performed by this constructor.
|
jaroslav@339
|
342 |
*
|
jaroslav@339
|
343 |
* @param protocol the name of the protocol to use.
|
jaroslav@339
|
344 |
* @param host the name of the host.
|
jaroslav@339
|
345 |
* @param port the port number on the host.
|
jaroslav@339
|
346 |
* @param file the file on the host
|
jaroslav@339
|
347 |
* @param handler the stream handler for the URL.
|
jaroslav@339
|
348 |
* @exception MalformedURLException if an unknown protocol is specified.
|
jaroslav@339
|
349 |
* @exception SecurityException
|
jaroslav@339
|
350 |
* if a security manager exists and its
|
jaroslav@339
|
351 |
* <code>checkPermission</code> method doesn't allow
|
jaroslav@339
|
352 |
* specifying a stream handler explicitly.
|
jaroslav@339
|
353 |
* @see java.lang.System#getProperty(java.lang.String)
|
jaroslav@339
|
354 |
* @see java.net.URL#setURLStreamHandlerFactory(
|
jaroslav@339
|
355 |
* java.net.URLStreamHandlerFactory)
|
jaroslav@339
|
356 |
* @see java.net.URLStreamHandler
|
jaroslav@339
|
357 |
* @see java.net.URLStreamHandlerFactory#createURLStreamHandler(
|
jaroslav@339
|
358 |
* java.lang.String)
|
jaroslav@339
|
359 |
* @see SecurityManager#checkPermission
|
jaroslav@339
|
360 |
* @see java.net.NetPermission
|
jaroslav@339
|
361 |
*/
|
jaroslav@339
|
362 |
public URL(String protocol, String host, int port, String file,
|
jaroslav@339
|
363 |
URLStreamHandler handler) throws MalformedURLException {
|
jtulach@120
|
364 |
if (handler != null) {
|
jaroslav@122
|
365 |
throw new SecurityException();
|
jtulach@120
|
366 |
}
|
jtulach@120
|
367 |
|
jtulach@120
|
368 |
protocol = protocol.toLowerCase();
|
jtulach@120
|
369 |
this.protocol = protocol;
|
jtulach@120
|
370 |
if (host != null) {
|
jtulach@120
|
371 |
|
jtulach@120
|
372 |
/**
|
jtulach@120
|
373 |
* if host is a literal IPv6 address,
|
jtulach@120
|
374 |
* we will make it conform to RFC 2732
|
jtulach@120
|
375 |
*/
|
jtulach@120
|
376 |
if (host.indexOf(':') >= 0 && !host.startsWith("[")) {
|
jtulach@120
|
377 |
host = "["+host+"]";
|
jtulach@120
|
378 |
}
|
jtulach@120
|
379 |
this.host = host;
|
jtulach@120
|
380 |
|
jtulach@120
|
381 |
if (port < -1) {
|
jtulach@120
|
382 |
throw new MalformedURLException("Invalid port number :" +
|
jtulach@120
|
383 |
port);
|
jtulach@120
|
384 |
}
|
jtulach@120
|
385 |
this.port = port;
|
jtulach@120
|
386 |
authority = (port == -1) ? host : host + ":" + port;
|
jtulach@120
|
387 |
}
|
jtulach@120
|
388 |
|
jtulach@120
|
389 |
Parts parts = new Parts(file);
|
jtulach@120
|
390 |
path = parts.getPath();
|
jtulach@120
|
391 |
query = parts.getQuery();
|
jtulach@120
|
392 |
|
jtulach@120
|
393 |
if (query != null) {
|
jtulach@120
|
394 |
this.file = path + "?" + query;
|
jtulach@120
|
395 |
} else {
|
jtulach@120
|
396 |
this.file = path;
|
jtulach@120
|
397 |
}
|
jtulach@120
|
398 |
ref = parts.getRef();
|
jtulach@120
|
399 |
|
jtulach@120
|
400 |
// Note: we don't do validation of the URL here. Too risky to change
|
jtulach@120
|
401 |
// right now, but worth considering for future reference. -br
|
jaroslav@339
|
402 |
if (handler == null &&
|
jaroslav@339
|
403 |
(handler = getURLStreamHandler(protocol)) == null) {
|
jaroslav@339
|
404 |
throw new MalformedURLException("unknown protocol: " + protocol);
|
jaroslav@339
|
405 |
}
|
jaroslav@339
|
406 |
this.handler = handler;
|
jtulach@120
|
407 |
}
|
jtulach@120
|
408 |
|
jtulach@120
|
409 |
/**
|
jtulach@120
|
410 |
* Creates a <code>URL</code> object from the <code>String</code>
|
jtulach@120
|
411 |
* representation.
|
jtulach@120
|
412 |
* <p>
|
jtulach@120
|
413 |
* This constructor is equivalent to a call to the two-argument
|
jtulach@120
|
414 |
* constructor with a <code>null</code> first argument.
|
jtulach@120
|
415 |
*
|
jtulach@120
|
416 |
* @param spec the <code>String</code> to parse as a URL.
|
jtulach@120
|
417 |
* @exception MalformedURLException if no protocol is specified, or an
|
jtulach@120
|
418 |
* unknown protocol is found, or <tt>spec</tt> is <tt>null</tt>.
|
jtulach@120
|
419 |
* @see java.net.URL#URL(java.net.URL, java.lang.String)
|
jtulach@120
|
420 |
*/
|
jtulach@120
|
421 |
public URL(String spec) throws MalformedURLException {
|
jtulach@120
|
422 |
this(null, spec);
|
jtulach@120
|
423 |
}
|
jtulach@120
|
424 |
|
jtulach@120
|
425 |
/**
|
jtulach@120
|
426 |
* Creates a URL by parsing the given spec within a specified context.
|
jtulach@120
|
427 |
*
|
jtulach@120
|
428 |
* The new URL is created from the given context URL and the spec
|
jtulach@120
|
429 |
* argument as described in
|
jtulach@120
|
430 |
* RFC2396 "Uniform Resource Identifiers : Generic * Syntax" :
|
jtulach@120
|
431 |
* <blockquote><pre>
|
jtulach@120
|
432 |
* <scheme>://<authority><path>?<query>#<fragment>
|
jtulach@120
|
433 |
* </pre></blockquote>
|
jtulach@120
|
434 |
* The reference is parsed into the scheme, authority, path, query and
|
jtulach@120
|
435 |
* fragment parts. If the path component is empty and the scheme,
|
jtulach@120
|
436 |
* authority, and query components are undefined, then the new URL is a
|
jtulach@120
|
437 |
* reference to the current document. Otherwise, the fragment and query
|
jtulach@120
|
438 |
* parts present in the spec are used in the new URL.
|
jtulach@120
|
439 |
* <p>
|
jtulach@120
|
440 |
* If the scheme component is defined in the given spec and does not match
|
jtulach@120
|
441 |
* the scheme of the context, then the new URL is created as an absolute
|
jtulach@120
|
442 |
* URL based on the spec alone. Otherwise the scheme component is inherited
|
jtulach@120
|
443 |
* from the context URL.
|
jtulach@120
|
444 |
* <p>
|
jtulach@120
|
445 |
* If the authority component is present in the spec then the spec is
|
jtulach@120
|
446 |
* treated as absolute and the spec authority and path will replace the
|
jtulach@120
|
447 |
* context authority and path. If the authority component is absent in the
|
jtulach@120
|
448 |
* spec then the authority of the new URL will be inherited from the
|
jtulach@120
|
449 |
* context.
|
jtulach@120
|
450 |
* <p>
|
jtulach@120
|
451 |
* If the spec's path component begins with a slash character
|
jtulach@120
|
452 |
* "/" then the
|
jtulach@120
|
453 |
* path is treated as absolute and the spec path replaces the context path.
|
jtulach@120
|
454 |
* <p>
|
jtulach@120
|
455 |
* Otherwise, the path is treated as a relative path and is appended to the
|
jtulach@120
|
456 |
* context path, as described in RFC2396. Also, in this case,
|
jtulach@120
|
457 |
* the path is canonicalized through the removal of directory
|
jtulach@120
|
458 |
* changes made by occurences of ".." and ".".
|
jtulach@120
|
459 |
* <p>
|
jtulach@120
|
460 |
* For a more detailed description of URL parsing, refer to RFC2396.
|
jtulach@120
|
461 |
*
|
jtulach@120
|
462 |
* @param context the context in which to parse the specification.
|
jtulach@120
|
463 |
* @param spec the <code>String</code> to parse as a URL.
|
jtulach@120
|
464 |
* @exception MalformedURLException if no protocol is specified, or an
|
jtulach@120
|
465 |
* unknown protocol is found, or <tt>spec</tt> is <tt>null</tt>.
|
jtulach@120
|
466 |
* @see java.net.URL#URL(java.lang.String, java.lang.String,
|
jtulach@120
|
467 |
* int, java.lang.String)
|
jtulach@120
|
468 |
* @see java.net.URLStreamHandler
|
jtulach@120
|
469 |
* @see java.net.URLStreamHandler#parseURL(java.net.URL,
|
jtulach@120
|
470 |
* java.lang.String, int, int)
|
jtulach@120
|
471 |
*/
|
jtulach@120
|
472 |
public URL(URL context, String spec) throws MalformedURLException {
|
jtulach@120
|
473 |
this(context, spec, null);
|
jtulach@120
|
474 |
}
|
jtulach@120
|
475 |
|
jtulach@120
|
476 |
/**
|
jtulach@120
|
477 |
* Creates a URL by parsing the given spec with the specified handler
|
jtulach@120
|
478 |
* within a specified context. If the handler is null, the parsing
|
jtulach@120
|
479 |
* occurs as with the two argument constructor.
|
jtulach@120
|
480 |
*
|
jtulach@120
|
481 |
* @param context the context in which to parse the specification.
|
jtulach@120
|
482 |
* @param spec the <code>String</code> to parse as a URL.
|
jtulach@120
|
483 |
* @param handler the stream handler for the URL.
|
jtulach@120
|
484 |
* @exception MalformedURLException if no protocol is specified, or an
|
jtulach@120
|
485 |
* unknown protocol is found, or <tt>spec</tt> is <tt>null</tt>.
|
jtulach@120
|
486 |
* @exception SecurityException
|
jtulach@120
|
487 |
* if a security manager exists and its
|
jtulach@120
|
488 |
* <code>checkPermission</code> method doesn't allow
|
jtulach@120
|
489 |
* specifying a stream handler.
|
jtulach@120
|
490 |
* @see java.net.URL#URL(java.lang.String, java.lang.String,
|
jtulach@120
|
491 |
* int, java.lang.String)
|
jtulach@120
|
492 |
* @see java.net.URLStreamHandler
|
jtulach@120
|
493 |
* @see java.net.URLStreamHandler#parseURL(java.net.URL,
|
jtulach@120
|
494 |
* java.lang.String, int, int)
|
jtulach@120
|
495 |
*/
|
jaroslav@339
|
496 |
public URL(URL context, String spec, URLStreamHandler handler)
|
jtulach@120
|
497 |
throws MalformedURLException
|
jtulach@120
|
498 |
{
|
jtulach@120
|
499 |
String original = spec;
|
jtulach@120
|
500 |
int i, limit, c;
|
jtulach@120
|
501 |
int start = 0;
|
jtulach@120
|
502 |
String newProtocol = null;
|
jtulach@120
|
503 |
boolean aRef=false;
|
jtulach@120
|
504 |
boolean isRelative = false;
|
jtulach@120
|
505 |
|
jtulach@120
|
506 |
// Check for permission to specify a handler
|
jtulach@120
|
507 |
if (handler != null) {
|
jaroslav@122
|
508 |
throw new SecurityException();
|
jtulach@120
|
509 |
}
|
jtulach@120
|
510 |
|
jtulach@120
|
511 |
try {
|
jtulach@120
|
512 |
limit = spec.length();
|
jtulach@120
|
513 |
while ((limit > 0) && (spec.charAt(limit - 1) <= ' ')) {
|
jtulach@120
|
514 |
limit--; //eliminate trailing whitespace
|
jtulach@120
|
515 |
}
|
jtulach@120
|
516 |
while ((start < limit) && (spec.charAt(start) <= ' ')) {
|
jtulach@120
|
517 |
start++; // eliminate leading whitespace
|
jtulach@120
|
518 |
}
|
jtulach@120
|
519 |
|
jtulach@120
|
520 |
if (spec.regionMatches(true, start, "url:", 0, 4)) {
|
jtulach@120
|
521 |
start += 4;
|
jtulach@120
|
522 |
}
|
jtulach@120
|
523 |
if (start < spec.length() && spec.charAt(start) == '#') {
|
jtulach@120
|
524 |
/* we're assuming this is a ref relative to the context URL.
|
jtulach@120
|
525 |
* This means protocols cannot start w/ '#', but we must parse
|
jtulach@120
|
526 |
* ref URL's like: "hello:there" w/ a ':' in them.
|
jtulach@120
|
527 |
*/
|
jtulach@120
|
528 |
aRef=true;
|
jtulach@120
|
529 |
}
|
jtulach@120
|
530 |
for (i = start ; !aRef && (i < limit) &&
|
jtulach@120
|
531 |
((c = spec.charAt(i)) != '/') ; i++) {
|
jtulach@120
|
532 |
if (c == ':') {
|
jtulach@120
|
533 |
|
jtulach@120
|
534 |
String s = spec.substring(start, i).toLowerCase();
|
jtulach@120
|
535 |
if (isValidProtocol(s)) {
|
jtulach@120
|
536 |
newProtocol = s;
|
jtulach@120
|
537 |
start = i + 1;
|
jtulach@120
|
538 |
}
|
jtulach@120
|
539 |
break;
|
jtulach@120
|
540 |
}
|
jtulach@120
|
541 |
}
|
jtulach@120
|
542 |
|
jtulach@120
|
543 |
// Only use our context if the protocols match.
|
jtulach@120
|
544 |
protocol = newProtocol;
|
jtulach@120
|
545 |
if ((context != null) && ((newProtocol == null) ||
|
jtulach@120
|
546 |
newProtocol.equalsIgnoreCase(context.protocol))) {
|
jtulach@120
|
547 |
// inherit the protocol handler from the context
|
jtulach@120
|
548 |
// if not specified to the constructor
|
jaroslav@339
|
549 |
if (handler == null) {
|
jaroslav@339
|
550 |
handler = context.handler;
|
jaroslav@339
|
551 |
}
|
jtulach@120
|
552 |
|
jtulach@120
|
553 |
// If the context is a hierarchical URL scheme and the spec
|
jtulach@120
|
554 |
// contains a matching scheme then maintain backwards
|
jtulach@120
|
555 |
// compatibility and treat it as if the spec didn't contain
|
jtulach@120
|
556 |
// the scheme; see 5.2.3 of RFC2396
|
jtulach@120
|
557 |
if (context.path != null && context.path.startsWith("/"))
|
jtulach@120
|
558 |
newProtocol = null;
|
jtulach@120
|
559 |
|
jtulach@120
|
560 |
if (newProtocol == null) {
|
jtulach@120
|
561 |
protocol = context.protocol;
|
jtulach@120
|
562 |
authority = context.authority;
|
jtulach@120
|
563 |
userInfo = context.userInfo;
|
jtulach@120
|
564 |
host = context.host;
|
jtulach@120
|
565 |
port = context.port;
|
jtulach@120
|
566 |
file = context.file;
|
jtulach@120
|
567 |
path = context.path;
|
jtulach@120
|
568 |
isRelative = true;
|
jtulach@120
|
569 |
}
|
jtulach@120
|
570 |
}
|
jtulach@120
|
571 |
|
jtulach@120
|
572 |
if (protocol == null) {
|
jtulach@120
|
573 |
throw new MalformedURLException("no protocol: "+original);
|
jtulach@120
|
574 |
}
|
jtulach@120
|
575 |
|
jtulach@120
|
576 |
// Get the protocol handler if not specified or the protocol
|
jtulach@120
|
577 |
// of the context could not be used
|
jaroslav@339
|
578 |
if (handler == null &&
|
jaroslav@339
|
579 |
(handler = getURLStreamHandler(protocol)) == null) {
|
jaroslav@339
|
580 |
throw new MalformedURLException("unknown protocol: "+protocol);
|
jaroslav@339
|
581 |
}
|
jaroslav@339
|
582 |
this.handler = handler;
|
jtulach@120
|
583 |
|
jtulach@120
|
584 |
i = spec.indexOf('#', start);
|
jtulach@120
|
585 |
if (i >= 0) {
|
jaroslav@339
|
586 |
//thrw(protocol + " hnd: " + handler.getClass().getName() + " i: " + i);
|
jtulach@120
|
587 |
ref = spec.substring(i + 1, limit);
|
jtulach@120
|
588 |
limit = i;
|
jtulach@120
|
589 |
}
|
jtulach@120
|
590 |
|
jtulach@120
|
591 |
/*
|
jtulach@120
|
592 |
* Handle special case inheritance of query and fragment
|
jtulach@120
|
593 |
* implied by RFC2396 section 5.2.2.
|
jtulach@120
|
594 |
*/
|
jtulach@120
|
595 |
if (isRelative && start == limit) {
|
jtulach@120
|
596 |
query = context.query;
|
jtulach@120
|
597 |
if (ref == null) {
|
jtulach@120
|
598 |
ref = context.ref;
|
jtulach@120
|
599 |
}
|
jtulach@120
|
600 |
}
|
jtulach@120
|
601 |
|
jaroslav@339
|
602 |
handler.parseURL(this, spec, start, limit);
|
jtulach@120
|
603 |
|
jtulach@120
|
604 |
} catch(MalformedURLException e) {
|
jtulach@120
|
605 |
throw e;
|
jtulach@120
|
606 |
} catch(Exception e) {
|
jtulach@120
|
607 |
MalformedURLException exception = new MalformedURLException(e.getMessage());
|
jtulach@120
|
608 |
exception.initCause(e);
|
jtulach@120
|
609 |
throw exception;
|
jtulach@120
|
610 |
}
|
jtulach@120
|
611 |
}
|
jaroslav@339
|
612 |
|
jtulach@120
|
613 |
/*
|
jtulach@120
|
614 |
* Returns true if specified string is a valid protocol name.
|
jtulach@120
|
615 |
*/
|
jtulach@120
|
616 |
private boolean isValidProtocol(String protocol) {
|
jtulach@120
|
617 |
int len = protocol.length();
|
jtulach@120
|
618 |
if (len < 1)
|
jtulach@120
|
619 |
return false;
|
jtulach@120
|
620 |
char c = protocol.charAt(0);
|
jtulach@120
|
621 |
if (!Character.isLetter(c))
|
jtulach@120
|
622 |
return false;
|
jtulach@120
|
623 |
for (int i = 1; i < len; i++) {
|
jtulach@120
|
624 |
c = protocol.charAt(i);
|
jtulach@120
|
625 |
if (!Character.isLetterOrDigit(c) && c != '.' && c != '+' &&
|
jtulach@120
|
626 |
c != '-') {
|
jtulach@120
|
627 |
return false;
|
jtulach@120
|
628 |
}
|
jtulach@120
|
629 |
}
|
jtulach@120
|
630 |
return true;
|
jtulach@120
|
631 |
}
|
jtulach@120
|
632 |
|
jtulach@120
|
633 |
/**
|
jtulach@120
|
634 |
* Sets the fields of the URL. This is not a public method so that
|
jtulach@120
|
635 |
* only URLStreamHandlers can modify URL fields. URLs are
|
jtulach@120
|
636 |
* otherwise constant.
|
jtulach@120
|
637 |
*
|
jtulach@120
|
638 |
* @param protocol the name of the protocol to use
|
jtulach@120
|
639 |
* @param host the name of the host
|
jtulach@120
|
640 |
@param port the port number on the host
|
jtulach@120
|
641 |
* @param file the file on the host
|
jtulach@120
|
642 |
* @param ref the internal reference in the URL
|
jtulach@120
|
643 |
*/
|
jtulach@120
|
644 |
protected void set(String protocol, String host,
|
jtulach@120
|
645 |
int port, String file, String ref) {
|
jtulach@120
|
646 |
synchronized (this) {
|
jtulach@120
|
647 |
this.protocol = protocol;
|
jtulach@120
|
648 |
this.host = host;
|
jtulach@120
|
649 |
authority = port == -1 ? host : host + ":" + port;
|
jtulach@120
|
650 |
this.port = port;
|
jtulach@120
|
651 |
this.file = file;
|
jtulach@120
|
652 |
this.ref = ref;
|
jtulach@120
|
653 |
/* This is very important. We must recompute this after the
|
jtulach@120
|
654 |
* URL has been changed. */
|
jtulach@120
|
655 |
hashCode = -1;
|
jaroslav@339
|
656 |
hostAddress = null;
|
jtulach@120
|
657 |
int q = file.lastIndexOf('?');
|
jtulach@120
|
658 |
if (q != -1) {
|
jtulach@120
|
659 |
query = file.substring(q+1);
|
jtulach@120
|
660 |
path = file.substring(0, q);
|
jtulach@120
|
661 |
} else
|
jtulach@120
|
662 |
path = file;
|
jtulach@120
|
663 |
}
|
jtulach@120
|
664 |
}
|
jtulach@120
|
665 |
|
jtulach@120
|
666 |
/**
|
jtulach@120
|
667 |
* Sets the specified 8 fields of the URL. This is not a public method so
|
jtulach@120
|
668 |
* that only URLStreamHandlers can modify URL fields. URLs are otherwise
|
jtulach@120
|
669 |
* constant.
|
jtulach@120
|
670 |
*
|
jtulach@120
|
671 |
* @param protocol the name of the protocol to use
|
jtulach@120
|
672 |
* @param host the name of the host
|
jtulach@120
|
673 |
* @param port the port number on the host
|
jtulach@120
|
674 |
* @param authority the authority part for the url
|
jtulach@120
|
675 |
* @param userInfo the username and password
|
jtulach@120
|
676 |
* @param path the file on the host
|
jtulach@120
|
677 |
* @param ref the internal reference in the URL
|
jtulach@120
|
678 |
* @param query the query part of this URL
|
jtulach@120
|
679 |
* @since 1.3
|
jtulach@120
|
680 |
*/
|
jtulach@120
|
681 |
protected void set(String protocol, String host, int port,
|
jtulach@120
|
682 |
String authority, String userInfo, String path,
|
jtulach@120
|
683 |
String query, String ref) {
|
jtulach@120
|
684 |
synchronized (this) {
|
jtulach@120
|
685 |
this.protocol = protocol;
|
jtulach@120
|
686 |
this.host = host;
|
jtulach@120
|
687 |
this.port = port;
|
jtulach@120
|
688 |
this.file = query == null ? path : path + "?" + query;
|
jtulach@120
|
689 |
this.userInfo = userInfo;
|
jtulach@120
|
690 |
this.path = path;
|
jtulach@120
|
691 |
this.ref = ref;
|
jtulach@120
|
692 |
/* This is very important. We must recompute this after the
|
jtulach@120
|
693 |
* URL has been changed. */
|
jtulach@120
|
694 |
hashCode = -1;
|
jaroslav@339
|
695 |
hostAddress = null;
|
jtulach@120
|
696 |
this.query = query;
|
jtulach@120
|
697 |
this.authority = authority;
|
jtulach@120
|
698 |
}
|
jtulach@120
|
699 |
}
|
jtulach@120
|
700 |
|
jtulach@120
|
701 |
/**
|
jtulach@120
|
702 |
* Gets the query part of this <code>URL</code>.
|
jtulach@120
|
703 |
*
|
jtulach@120
|
704 |
* @return the query part of this <code>URL</code>,
|
jtulach@120
|
705 |
* or <CODE>null</CODE> if one does not exist
|
jtulach@120
|
706 |
* @since 1.3
|
jtulach@120
|
707 |
*/
|
jtulach@120
|
708 |
public String getQuery() {
|
jtulach@120
|
709 |
return query;
|
jtulach@120
|
710 |
}
|
jtulach@120
|
711 |
|
jtulach@120
|
712 |
/**
|
jtulach@120
|
713 |
* Gets the path part of this <code>URL</code>.
|
jtulach@120
|
714 |
*
|
jtulach@120
|
715 |
* @return the path part of this <code>URL</code>, or an
|
jtulach@120
|
716 |
* empty string if one does not exist
|
jtulach@120
|
717 |
* @since 1.3
|
jtulach@120
|
718 |
*/
|
jtulach@120
|
719 |
public String getPath() {
|
jtulach@120
|
720 |
return path;
|
jtulach@120
|
721 |
}
|
jtulach@120
|
722 |
|
jtulach@120
|
723 |
/**
|
jtulach@120
|
724 |
* Gets the userInfo part of this <code>URL</code>.
|
jtulach@120
|
725 |
*
|
jtulach@120
|
726 |
* @return the userInfo part of this <code>URL</code>, or
|
jtulach@120
|
727 |
* <CODE>null</CODE> if one does not exist
|
jtulach@120
|
728 |
* @since 1.3
|
jtulach@120
|
729 |
*/
|
jtulach@120
|
730 |
public String getUserInfo() {
|
jtulach@120
|
731 |
return userInfo;
|
jtulach@120
|
732 |
}
|
jtulach@120
|
733 |
|
jtulach@120
|
734 |
/**
|
jtulach@120
|
735 |
* Gets the authority part of this <code>URL</code>.
|
jtulach@120
|
736 |
*
|
jtulach@120
|
737 |
* @return the authority part of this <code>URL</code>
|
jtulach@120
|
738 |
* @since 1.3
|
jtulach@120
|
739 |
*/
|
jtulach@120
|
740 |
public String getAuthority() {
|
jtulach@120
|
741 |
return authority;
|
jtulach@120
|
742 |
}
|
jtulach@120
|
743 |
|
jtulach@120
|
744 |
/**
|
jtulach@120
|
745 |
* Gets the port number of this <code>URL</code>.
|
jtulach@120
|
746 |
*
|
jtulach@120
|
747 |
* @return the port number, or -1 if the port is not set
|
jtulach@120
|
748 |
*/
|
jtulach@120
|
749 |
public int getPort() {
|
jtulach@120
|
750 |
return port;
|
jtulach@120
|
751 |
}
|
jtulach@120
|
752 |
|
jtulach@120
|
753 |
/**
|
jaroslav@339
|
754 |
* Gets the default port number of the protocol associated
|
jaroslav@339
|
755 |
* with this <code>URL</code>. If the URL scheme or the URLStreamHandler
|
jaroslav@339
|
756 |
* for the URL do not define a default port number,
|
jaroslav@339
|
757 |
* then -1 is returned.
|
jaroslav@339
|
758 |
*
|
jaroslav@339
|
759 |
* @return the port number
|
jaroslav@339
|
760 |
* @since 1.4
|
jaroslav@339
|
761 |
*/
|
jaroslav@339
|
762 |
public int getDefaultPort() {
|
jaroslav@339
|
763 |
return handler.getDefaultPort();
|
jaroslav@339
|
764 |
}
|
jaroslav@339
|
765 |
|
jaroslav@339
|
766 |
/**
|
jtulach@120
|
767 |
* Gets the protocol name of this <code>URL</code>.
|
jtulach@120
|
768 |
*
|
jtulach@120
|
769 |
* @return the protocol of this <code>URL</code>.
|
jtulach@120
|
770 |
*/
|
jtulach@120
|
771 |
public String getProtocol() {
|
jtulach@120
|
772 |
return protocol;
|
jtulach@120
|
773 |
}
|
jtulach@120
|
774 |
|
jtulach@120
|
775 |
/**
|
jtulach@120
|
776 |
* Gets the host name of this <code>URL</code>, if applicable.
|
jtulach@120
|
777 |
* The format of the host conforms to RFC 2732, i.e. for a
|
jtulach@120
|
778 |
* literal IPv6 address, this method will return the IPv6 address
|
jtulach@120
|
779 |
* enclosed in square brackets (<tt>'['</tt> and <tt>']'</tt>).
|
jtulach@120
|
780 |
*
|
jtulach@120
|
781 |
* @return the host name of this <code>URL</code>.
|
jtulach@120
|
782 |
*/
|
jtulach@120
|
783 |
public String getHost() {
|
jtulach@120
|
784 |
return host;
|
jtulach@120
|
785 |
}
|
jtulach@120
|
786 |
|
jtulach@120
|
787 |
/**
|
jtulach@120
|
788 |
* Gets the file name of this <code>URL</code>.
|
jtulach@120
|
789 |
* The returned file portion will be
|
jtulach@120
|
790 |
* the same as <CODE>getPath()</CODE>, plus the concatenation of
|
jtulach@120
|
791 |
* the value of <CODE>getQuery()</CODE>, if any. If there is
|
jtulach@120
|
792 |
* no query portion, this method and <CODE>getPath()</CODE> will
|
jtulach@120
|
793 |
* return identical results.
|
jtulach@120
|
794 |
*
|
jtulach@120
|
795 |
* @return the file name of this <code>URL</code>,
|
jtulach@120
|
796 |
* or an empty string if one does not exist
|
jtulach@120
|
797 |
*/
|
jtulach@120
|
798 |
public String getFile() {
|
jtulach@120
|
799 |
return file;
|
jtulach@120
|
800 |
}
|
jtulach@120
|
801 |
|
jtulach@120
|
802 |
/**
|
jtulach@120
|
803 |
* Gets the anchor (also known as the "reference") of this
|
jtulach@120
|
804 |
* <code>URL</code>.
|
jtulach@120
|
805 |
*
|
jtulach@120
|
806 |
* @return the anchor (also known as the "reference") of this
|
jtulach@120
|
807 |
* <code>URL</code>, or <CODE>null</CODE> if one does not exist
|
jtulach@120
|
808 |
*/
|
jtulach@120
|
809 |
public String getRef() {
|
jtulach@120
|
810 |
return ref;
|
jtulach@120
|
811 |
}
|
jtulach@120
|
812 |
|
jtulach@120
|
813 |
/**
|
jtulach@120
|
814 |
* Compares this URL for equality with another object.<p>
|
jtulach@120
|
815 |
*
|
jtulach@120
|
816 |
* If the given object is not a URL then this method immediately returns
|
jtulach@120
|
817 |
* <code>false</code>.<p>
|
jtulach@120
|
818 |
*
|
jtulach@120
|
819 |
* Two URL objects are equal if they have the same protocol, reference
|
jtulach@120
|
820 |
* equivalent hosts, have the same port number on the host, and the same
|
jtulach@120
|
821 |
* file and fragment of the file.<p>
|
jtulach@120
|
822 |
*
|
jtulach@120
|
823 |
* Two hosts are considered equivalent if both host names can be resolved
|
jtulach@120
|
824 |
* into the same IP addresses; else if either host name can't be
|
jtulach@120
|
825 |
* resolved, the host names must be equal without regard to case; or both
|
jtulach@120
|
826 |
* host names equal to null.<p>
|
jtulach@120
|
827 |
*
|
jtulach@120
|
828 |
* Since hosts comparison requires name resolution, this operation is a
|
jtulach@120
|
829 |
* blocking operation. <p>
|
jtulach@120
|
830 |
*
|
jtulach@120
|
831 |
* Note: The defined behavior for <code>equals</code> is known to
|
jtulach@120
|
832 |
* be inconsistent with virtual hosting in HTTP.
|
jtulach@120
|
833 |
*
|
jtulach@120
|
834 |
* @param obj the URL to compare against.
|
jtulach@120
|
835 |
* @return <code>true</code> if the objects are the same;
|
jtulach@120
|
836 |
* <code>false</code> otherwise.
|
jtulach@120
|
837 |
*/
|
jtulach@120
|
838 |
public boolean equals(Object obj) {
|
jtulach@120
|
839 |
if (!(obj instanceof URL))
|
jtulach@120
|
840 |
return false;
|
jtulach@120
|
841 |
URL u2 = (URL)obj;
|
jtulach@120
|
842 |
|
jaroslav@339
|
843 |
return handler.equals(this, u2);
|
jtulach@120
|
844 |
}
|
jtulach@120
|
845 |
|
jtulach@120
|
846 |
/**
|
jtulach@120
|
847 |
* Creates an integer suitable for hash table indexing.<p>
|
jtulach@120
|
848 |
*
|
jtulach@120
|
849 |
* The hash code is based upon all the URL components relevant for URL
|
jtulach@120
|
850 |
* comparison. As such, this operation is a blocking operation.<p>
|
jtulach@120
|
851 |
*
|
jtulach@120
|
852 |
* @return a hash code for this <code>URL</code>.
|
jtulach@120
|
853 |
*/
|
jtulach@120
|
854 |
public synchronized int hashCode() {
|
jtulach@120
|
855 |
if (hashCode != -1)
|
jtulach@120
|
856 |
return hashCode;
|
jtulach@120
|
857 |
|
jaroslav@339
|
858 |
hashCode = handler.hashCode(this);
|
jtulach@120
|
859 |
return hashCode;
|
jtulach@120
|
860 |
}
|
jtulach@120
|
861 |
|
jtulach@120
|
862 |
/**
|
jtulach@120
|
863 |
* Compares two URLs, excluding the fragment component.<p>
|
jtulach@120
|
864 |
*
|
jtulach@120
|
865 |
* Returns <code>true</code> if this <code>URL</code> and the
|
jtulach@120
|
866 |
* <code>other</code> argument are equal without taking the
|
jtulach@120
|
867 |
* fragment component into consideration.
|
jtulach@120
|
868 |
*
|
jtulach@120
|
869 |
* @param other the <code>URL</code> to compare against.
|
jtulach@120
|
870 |
* @return <code>true</code> if they reference the same remote object;
|
jtulach@120
|
871 |
* <code>false</code> otherwise.
|
jtulach@120
|
872 |
*/
|
jtulach@120
|
873 |
public boolean sameFile(URL other) {
|
jaroslav@339
|
874 |
return handler.sameFile(this, other);
|
jtulach@120
|
875 |
}
|
jtulach@120
|
876 |
|
jtulach@120
|
877 |
/**
|
jtulach@120
|
878 |
* Constructs a string representation of this <code>URL</code>. The
|
jtulach@120
|
879 |
* string is created by calling the <code>toExternalForm</code>
|
jtulach@120
|
880 |
* method of the stream protocol handler for this object.
|
jtulach@120
|
881 |
*
|
jtulach@120
|
882 |
* @return a string representation of this object.
|
jtulach@120
|
883 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, int,
|
jtulach@120
|
884 |
* java.lang.String)
|
jtulach@120
|
885 |
* @see java.net.URLStreamHandler#toExternalForm(java.net.URL)
|
jtulach@120
|
886 |
*/
|
jtulach@120
|
887 |
public String toString() {
|
jtulach@120
|
888 |
return toExternalForm();
|
jtulach@120
|
889 |
}
|
jtulach@120
|
890 |
|
jtulach@120
|
891 |
/**
|
jtulach@120
|
892 |
* Constructs a string representation of this <code>URL</code>. The
|
jtulach@120
|
893 |
* string is created by calling the <code>toExternalForm</code>
|
jtulach@120
|
894 |
* method of the stream protocol handler for this object.
|
jtulach@120
|
895 |
*
|
jtulach@120
|
896 |
* @return a string representation of this object.
|
jtulach@120
|
897 |
* @see java.net.URL#URL(java.lang.String, java.lang.String,
|
jtulach@120
|
898 |
* int, java.lang.String)
|
jtulach@120
|
899 |
* @see java.net.URLStreamHandler#toExternalForm(java.net.URL)
|
jtulach@120
|
900 |
*/
|
jtulach@120
|
901 |
public String toExternalForm() {
|
jaroslav@339
|
902 |
return handler.toExternalForm(this);
|
jtulach@120
|
903 |
}
|
jtulach@120
|
904 |
|
jtulach@120
|
905 |
/**
|
jtulach@120
|
906 |
* Returns a {@link java.net.URLConnection URLConnection} instance that
|
jtulach@120
|
907 |
* represents a connection to the remote object referred to by the
|
jtulach@120
|
908 |
* {@code URL}.
|
jtulach@120
|
909 |
*
|
jtulach@120
|
910 |
* <P>A new instance of {@linkplain java.net.URLConnection URLConnection} is
|
jtulach@120
|
911 |
* created every time when invoking the
|
jtulach@120
|
912 |
* {@linkplain java.net.URLStreamHandler#openConnection(URL)
|
jtulach@120
|
913 |
* URLStreamHandler.openConnection(URL)} method of the protocol handler for
|
jtulach@120
|
914 |
* this URL.</P>
|
jtulach@120
|
915 |
*
|
jtulach@120
|
916 |
* <P>It should be noted that a URLConnection instance does not establish
|
jtulach@120
|
917 |
* the actual network connection on creation. This will happen only when
|
jtulach@120
|
918 |
* calling {@linkplain java.net.URLConnection#connect() URLConnection.connect()}.</P>
|
jtulach@120
|
919 |
*
|
jtulach@120
|
920 |
* <P>If for the URL's protocol (such as HTTP or JAR), there
|
jtulach@120
|
921 |
* exists a public, specialized URLConnection subclass belonging
|
jtulach@120
|
922 |
* to one of the following packages or one of their subpackages:
|
jtulach@120
|
923 |
* java.lang, java.io, java.util, java.net, the connection
|
jtulach@120
|
924 |
* returned will be of that subclass. For example, for HTTP an
|
jtulach@120
|
925 |
* HttpURLConnection will be returned, and for JAR a
|
jtulach@120
|
926 |
* JarURLConnection will be returned.</P>
|
jtulach@120
|
927 |
*
|
jtulach@120
|
928 |
* @return a {@link java.net.URLConnection URLConnection} linking
|
jtulach@120
|
929 |
* to the URL.
|
jtulach@120
|
930 |
* @exception IOException if an I/O exception occurs.
|
jtulach@120
|
931 |
* @see java.net.URL#URL(java.lang.String, java.lang.String,
|
jtulach@120
|
932 |
* int, java.lang.String)
|
jtulach@120
|
933 |
*/
|
jaroslav@122
|
934 |
// public URLConnection openConnection() throws java.io.IOException {
|
jaroslav@122
|
935 |
// return handler.openConnection(this);
|
jaroslav@122
|
936 |
// }
|
jtulach@120
|
937 |
|
jtulach@120
|
938 |
|
jtulach@120
|
939 |
/**
|
jtulach@120
|
940 |
* Opens a connection to this <code>URL</code> and returns an
|
jtulach@120
|
941 |
* <code>InputStream</code> for reading from that connection. This
|
jtulach@120
|
942 |
* method is a shorthand for:
|
jtulach@120
|
943 |
* <blockquote><pre>
|
jtulach@120
|
944 |
* openConnection().getInputStream()
|
jtulach@120
|
945 |
* </pre></blockquote>
|
jtulach@120
|
946 |
*
|
jtulach@120
|
947 |
* @return an input stream for reading from the URL connection.
|
jtulach@120
|
948 |
* @exception IOException if an I/O exception occurs.
|
jtulach@120
|
949 |
* @see java.net.URL#openConnection()
|
jtulach@120
|
950 |
* @see java.net.URLConnection#getInputStream()
|
jtulach@120
|
951 |
*/
|
jtulach@120
|
952 |
public final InputStream openStream() throws java.io.IOException {
|
jaroslav@122
|
953 |
throw new IOException();
|
jaroslav@122
|
954 |
// return openConnection().getInputStream();
|
jtulach@120
|
955 |
}
|
jtulach@120
|
956 |
|
jtulach@120
|
957 |
/**
|
jtulach@120
|
958 |
* Gets the contents of this URL. This method is a shorthand for:
|
jtulach@120
|
959 |
* <blockquote><pre>
|
jtulach@120
|
960 |
* openConnection().getContent()
|
jtulach@120
|
961 |
* </pre></blockquote>
|
jtulach@120
|
962 |
*
|
jtulach@120
|
963 |
* @return the contents of this URL.
|
jtulach@120
|
964 |
* @exception IOException if an I/O exception occurs.
|
jtulach@120
|
965 |
* @see java.net.URLConnection#getContent()
|
jtulach@120
|
966 |
*/
|
jtulach@120
|
967 |
public final Object getContent() throws java.io.IOException {
|
jaroslav@342
|
968 |
return loadText(toExternalForm());
|
jtulach@120
|
969 |
}
|
jaroslav@342
|
970 |
|
jaroslav@342
|
971 |
@JavaScriptBody(args = "url", body = ""
|
jaroslav@342
|
972 |
+ "var request = new XMLHttpRequest();\n"
|
jaroslav@342
|
973 |
+ "request.open('GET', url, false);\n"
|
jaroslav@342
|
974 |
+ "request.send();\n"
|
jaroslav@342
|
975 |
+ "return request.responseText;\n"
|
jaroslav@342
|
976 |
)
|
jaroslav@342
|
977 |
private static native String loadText(String url) throws IOException;
|
jtulach@120
|
978 |
|
jtulach@120
|
979 |
/**
|
jtulach@120
|
980 |
* Gets the contents of this URL. This method is a shorthand for:
|
jtulach@120
|
981 |
* <blockquote><pre>
|
jtulach@120
|
982 |
* openConnection().getContent(Class[])
|
jtulach@120
|
983 |
* </pre></blockquote>
|
jtulach@120
|
984 |
*
|
jtulach@120
|
985 |
* @param classes an array of Java types
|
jtulach@120
|
986 |
* @return the content object of this URL that is the first match of
|
jtulach@120
|
987 |
* the types specified in the classes array.
|
jtulach@120
|
988 |
* null if none of the requested types are supported.
|
jtulach@120
|
989 |
* @exception IOException if an I/O exception occurs.
|
jtulach@120
|
990 |
* @see java.net.URLConnection#getContent(Class[])
|
jtulach@120
|
991 |
* @since 1.3
|
jtulach@120
|
992 |
*/
|
jtulach@120
|
993 |
public final Object getContent(Class[] classes)
|
jtulach@120
|
994 |
throws java.io.IOException {
|
jaroslav@342
|
995 |
for (Class<?> c : classes) {
|
jaroslav@342
|
996 |
if (c == String.class) {
|
jaroslav@342
|
997 |
return getContent();
|
jaroslav@342
|
998 |
}
|
jaroslav@342
|
999 |
}
|
jaroslav@342
|
1000 |
return null;
|
jtulach@120
|
1001 |
}
|
jtulach@120
|
1002 |
|
jaroslav@339
|
1003 |
static URLStreamHandler getURLStreamHandler(String protocol) {
|
jaroslav@339
|
1004 |
Class<URLStreamHandler> c = URLStreamHandler.class; // XXX only here to pre-initialize URLStreamHandler
|
jaroslav@339
|
1005 |
URLStreamHandler universal = new URLStreamHandler() {};
|
jaroslav@339
|
1006 |
return universal;
|
jaroslav@339
|
1007 |
}
|
jtulach@120
|
1008 |
|
jtulach@120
|
1009 |
}
|
jtulach@120
|
1010 |
|
jtulach@120
|
1011 |
class Parts {
|
jtulach@120
|
1012 |
String path, query, ref;
|
jtulach@120
|
1013 |
|
jtulach@120
|
1014 |
Parts(String file) {
|
jtulach@120
|
1015 |
int ind = file.indexOf('#');
|
jtulach@120
|
1016 |
ref = ind < 0 ? null: file.substring(ind + 1);
|
jtulach@120
|
1017 |
file = ind < 0 ? file: file.substring(0, ind);
|
jtulach@120
|
1018 |
int q = file.lastIndexOf('?');
|
jtulach@120
|
1019 |
if (q != -1) {
|
jtulach@120
|
1020 |
query = file.substring(q+1);
|
jtulach@120
|
1021 |
path = file.substring(0, q);
|
jtulach@120
|
1022 |
} else {
|
jtulach@120
|
1023 |
path = file;
|
jtulach@120
|
1024 |
}
|
jtulach@120
|
1025 |
}
|
jtulach@120
|
1026 |
|
jtulach@120
|
1027 |
String getPath() {
|
jtulach@120
|
1028 |
return path;
|
jtulach@120
|
1029 |
}
|
jtulach@120
|
1030 |
|
jtulach@120
|
1031 |
String getQuery() {
|
jtulach@120
|
1032 |
return query;
|
jtulach@120
|
1033 |
}
|
jtulach@120
|
1034 |
|
jtulach@120
|
1035 |
String getRef() {
|
jtulach@120
|
1036 |
return ref;
|
jtulach@120
|
1037 |
}
|
jtulach@120
|
1038 |
}
|